void ReadlineWindow::Redisplay ( )

protectedvirtual

This basically implement displaying the whole line, starting with the prompt and the rl_line_buffer. It also checks if displaying it results in a scroll of the window and adapt fPromptY accordingly.

The prompt is displayed in the color defined by fColor.

Before the cursor position is finally set a screen refresh (Refresh()) is initiated to ensure that nothing afterwards will change the cursor position. It might be necessary to overwrite this function.

Todo:

fix docu

Reimplemented from Readline.

Definition at line 202 of file ReadlineWindow.cc.

References buffer, end, fColor, fPromptX, fPromptY, fWindow, Readline::GetBuffer(), Readline::GetCursor(), Readline::GetPrompt(), and Refresh().

Referenced by EventHook().

{
    // Move to the beginning of the output
    wmove(fWindow, fPromptY, fPromptX);

    // Get site of the window
    int lines, cols;
    getmaxyx(fWindow, lines, cols);

    const string prompt = GetPrompt();
    const string buffer = GetBuffer();

    // Issue promt and redisplay text
    wattron(fWindow, fColor);
    wprintw(fWindow, "%s", prompt.c_str());
    wattroff(fWindow, fColor);
    wprintw(fWindow, "%s", buffer.c_str());

    // Clear everything after that
    wclrtobot(fWindow);

    // Calculate absolute position in window or beginning of output
    int xy = fPromptY*cols + fPromptX;

    // Calculate position of end of prompt
    xy += prompt.length();

    // Calculate position of cursor and end of output
    const int cur = xy + GetCursor();
    const int end = xy + buffer.size();

    // Calculate if the above output scrolled the window and by how many lines
    int scrolls = end/cols - lines + 1;

    if (scrolls<0)
        scrolls = 0;

    fPromptY -= scrolls;

    // new position
    const int px = cur%cols;
    const int py = scrolls>=1 ? cur/cols - scrolls : cur/cols;

    // Make sure that whatever happens while typing the correct
    // screen is shown (otherwise the top-panel disappears when
    // we scroll)
    Refresh();

    // Move the cursor to the cursor position
    wmove(fWindow, py, px);

    // Make changes visible on screen
    wrefresh(fWindow);
}

Here is the call graph for this function:

Here is the caller graph for this function: